Piston gib



March 29, 1932. c. WAL ER 1",'851,554

PISTON GIB 7 Filed Aug. 50, 193Q Fig.1. I 2.

IN VEN TOR.

Patented Mar. '29, 1932 I oLnv'ron Li WALKER, or PIEDMONT, CALIFORNIA PISTON IB Application filed August 30,1930. Serial No. 478,884.

This invention relates to pistons for use in pumps, engines, and the like, and more particularly to the means for connectingthe pistons to the crank shaft in that'type of 5 engine employing the Scotch yoke mechanism such for instance, as is particularly shown in my patent entitled Air pump #1,263,166, April 16, 1918. This type of pump or engine consists of a straight shaft to which is attached. one or more eccentrics and surrounding eacheccentric is a rectangular frame, said frames beingv fitted to the eccentric and being formed of the right types of metal to permit'of high rotational speed as between these parts. This rectangular frame has fiat, smooth and parallel surfaces on two or four sides according to whether two or four cylinders are operated from each eccentric. This frame in turn, bears against a,

flat surface ona gib, mounted in thepiston proper, and it is the object of this invention to improve the bearing and lubricating con-" ditionsas between the rectangular frame and a the bearing gib. This ,is accomplished in this invention by increasing the length of the contacting surfaces between the frame and the gib to such an extent that the length of the gio exceeds the diameter of the bore of the cylinder. g 7

One form'which my invention may assume is exemplified in the following description and illustrated by way of example in the accompanying drawings, in which:

Fig. 1 is a side elevation of a piston showing the piston and a side View ofthe gib to" ether with a fragment of the rods connectmg the pairs of pistons which are employed inithis type of opposed motor.

Fig. 2 is also a side elevation of the piston,

40 but shows an end view of-the bearing gib. Fig. 3 is a perspective view of the gib.

Fig. 4 is a diagram illustrating the general type of engine or pump to which this construction is attached. a I

Similar numerals of reference indicate corresponding parts in the several views of the accompanying drawings.

- 1 illustrates the skirt of the piston having the usual ring and head section; 2 illustrates the back side of the gib which comes in contact with a seat of corresponding contourin the piston and corresponds to the wrist pin used in the conventional type of connecting rod engine. 3 1s a; channel member attached rigidly to 25 but" is greaterinlength-than 2 for thelpurpose' of increasing the bearing areaof the inner face of the channel and to reduce the amount of oil'thrown into: the cylinder at the end of the stroke; 4 are connect:

ing rods, four in number for each pair of pistons operating oflfrom each pair ofparal- V p lel sides of'the rectangular frame.

It has been found "from experience; that" unless the length .of the bearing surface be-f' tween'the frame and the gib-jexceeds thejbore of the cylinder that the oil'and the bearing metalparticularly adjacent the ends o'flthe T gib' 'will breakdown, and that an'exce'ss of f oil will be. thrown into the cylinder-at the, 1

outer end of the stroke, but whereth i length of the fgib is" increased greater than thebbre of the "cylinder,.;"the condition will i be materiallyjmprove'd. a s

-While cer tain features of the present in;

vention are more or'less specifically illustrated',1 I wishit' understood that various changes in form and proportion may. be resortedto within vthescopeiof the appended claims; I similarly- Wish it understood that" the materials and finish of the several parts employed maybe such as the experience and judgment of the manufacturer'may dictatev or various uses demand. a I 7 Having thus described my invention, what Iclaim and desire-t0 secure by Letters Pat ent is: V r

1, Means for transmitting power between a rigidly connected pair of pistons and, a

shaft which consists of an eccentric mountedon said shaft, a rectangular frame with a circular opening fitted to said eccentric, said frame having oppositely disposed parallel, I bearing surfaces slidablyfitted to bearing gibs, saidgibs being fitted into corresponding seats in the pistons, said gibs having a 5 length greater than thebore ofthe cylinders that the pistons lit in. f .ry 7 V 2. Means for transmitting power between a rigidly connected pair-*o'f pistons and a v shaft which 'consistsof an eccentric mounted 9 7 V V a 1,851,554

: said frame having oppositely disposed par I sponding seats in the pistons; said gibs hav r I lng 'a'channel section on its bearingface to allel bearing surfaces slidablyfitted to bear ing g'ibs, said gibs'being fitted into correguide the said; rectangulariframes.

3. Means 'for' transmitting power between a rigidly connected pair of pistons and a shaft i which consists of an geccentric-; t d I said'shaft a rectangular frame With a circular opening fitted to said eccentric,": 'said frame having oppositely disposed parallel;

bearing surfaces slidabiy fitted to -bearing gibs, said gibs being fitted into 'corresponding seats inithe pistons, said gibs consisting. offa segment offiaitube Welded to a channel member.

4'. Means fforltransmitting poweribetween a a (rigidly connected pair of pistons and 4a shaft which consists of. an eccentric-mounted on said shaft, a rectangular frame with V circiflar openingfitted to said eccentric; said frame having oppositelyjd-isposed parallel bearing surfaces slidablyr'fitte'd ,toibearing gibs, said gibs being'ffittedlinto corresponding seats in the pistons said'gibs consisting of a s segment of a tube with segmental 'abutments on the convexsurface said tribe, segnientbe ingflrigidly attached toIa;channs1 member. 1

"15 rzjMeans' fortran'smit'ting pow'veribetween a .rigi'dlyfc'onnected pair'jo'f pistons-andfa I shga'ft which consists of anj'eccentric mounted' on'fsaid shaft, a re'ctangtilar if ram'ewith 1a circular opening fitted to said cccentric, saifd frame having"oppositely jiisposed ,arallelbearing 'surfacesfslid'ably fitted (to caring gibs, said gibs being fitted into acorrespond seats in;thepistons said gibs'having,a V

segmental form 1 at the back and a 7' channel form at the front, said channel sectionflbe- 'ingffacedwith babbifit on its eWe'aringsurfacesf 1 "oLIiifroNL' A K-ER' i 

